Sinus lift is accomplished DB (Fig.3, as compared to Fig.7 (preop)).  In fact the density of the bone graft 6 months postop remains the same as immediate postop, similar to the native bone as well (Fig.5).    Magnification of the coronal section.

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Xin Wei, DDS, PhD, MS 1st edition 09/29/2020, last revision 10/10/2020